From 8b8f7606f8f7189315e5582a4bd6cd1118f78583 Mon Sep 17 00:00:00 2001
From: Konrad Mrożek <kmrozek@comscore.com>
Date: Wed, 06 Sep 2023 11:59:12 +0000
Subject: [PATCH] Add diff2 to present difference between results

---
 clojure/src/test_runner.clj |   19 ++++++++++++++++++-
 1 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/clojure/src/test_runner.clj b/clojure/src/test_runner.clj
index af558db..e8cc9f9 100644
--- a/clojure/src/test_runner.clj
+++ b/clojure/src/test_runner.clj
@@ -9,8 +9,10 @@
      ~@body))
 
 (with-class-cache
-  (require '[clojure.test :as t]))
+  (require '[clojure.test :as t]
+           '[lambdaisland.deep-diff2 :as ddiff]))
 
+(def no-colors-printer (ddiff/printer {:print-color false}))
 (defmulti vim-report :type)
 
 (defmethod vim-report :begin-test-ns [m]
@@ -30,6 +32,21 @@
     (println (str "FAIL-CONTINUE:EXPECTED:" (pr-str (:expected m))))
     (println (str "FAIL-CONTINUE:ACTUAL:" (pr-str (:actual m))))))
 
+(defmethod t/assert-expr '= [msg form]
+  (let [args (rest form)
+        pred (first form)]
+    `(let [values# (list ~@args)
+           result# (apply ~pred values#)]
+       (if result#
+         (t/do-report {:type :pass, :message ~msg,
+                       :expected '~form, :actual (cons '~pred values#)})
+         (do
+           (t/do-report {:type :fail, :message ~msg,
+                         :expected '~form, :actual (list '~'not (cons '~pred values#))})
+           (-> (apply ddiff/diff values#)
+               (ddiff/pretty-print no-colors-printer))))
+       result#)))
+
 (defn- find-line-number [source-file m]
   (if (instance? Throwable (:actual m))
     (let [fname (-> source-file (java.io.File.) (.getName))]

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